Wood-grinding machine



July 2, 1 929. TYNER I 1.719.636

WOOD GRINDING MACHINE Filed. 001;. 1'7 1-927 2 sheets-sheet 1 In erfl'ov IYNER July 2, 1929. H. F. TYNER woon GRINDING MACHINE Filed Oct. 17, 192? 2 Sheets-Sheet Patented July 2, 1929.

HARRY FRANCIS TYNER,,0F OUTREMONT, QUEBEC, CANADA.

' WOOD-GRINDIN G MACHINE.

Application filed October 17, 1927. Serial No. 226,683.

The invention relates to a wood grinding machine, as described in the present speci fication and illustrated in the accompanying drawings that form part of thesame.

The invention consists essentially of the novel features of construction pointed out broadly and specifically in the claims for. novelty following a description containing an explanation in detail of an acceptable form of the invention. a

The objects of the invention are to facilitate the feeding of logs continuously and evenly to a set of grinders or a single grinder; to avoid all possibility of the logs jamming the mechanism of'the machine, notwithstanding what positions they may assume in their descent; to increase the output of ground wood for pulping purposes and thereby reduce the cost of'production in mills; to hold the wood firmly to the grinding mechanism during its operation and thus materially assist the stones in their work of breaking up the wood into. particles; and generally to provide a simple and effective as well as a. durable mechanism for the purpose of reducin' the wood to its ground stage.

In the rawin s, Figure 1 is a vertical sectional view 0 .the grinding mechanism, showing the progression gears projecting into the magazine and the grinding stones in cross section.

Figure 2 is an elevational view partially in section to disclose the interior of the. portion and a grinder 1n magazine in. one elevation.

Figure 3 is a plan view of the machine on the line 3-3 in Figure 2..

Figure 4 is a vertical sectional view of the complete mechanism showing the logs feeding on to the grinding stones.

Like numerals of. reference indicate corresponding parts in the variousfigures.

Referring to the drawings, the numeral 10 indicates the log magazine in the form of the stack tapering upwardly to the feed floor 11 and reinforced by the gussetplates 12 and 13, said gusset plates being backed by the I-beams 14 and 15 at the outer ends and supported at theupper inner ends by the channel irons 16 and 17 and at the lower ends by-the channel irons 18 and 19, thus making an extremely strong structure.

shafts 44.

. The stack of the log magazine 10 extends downwardly and flares outwardly at either side 20 and 21, thesefiaring sides terminating in the log box 22 and having the oppo site slots 23 and 24, these slots extending upwardly into the stack above the flares.

The progression gears 25 and 26 are each formed with the receding rounded teeth 27, these teeth having long sloping faces 28 extending over a round nose 29 into the short and approximately radial backs 30', the fans 28 being substantially cam shape to exert pressure on the wood and guide the same to the next succeeding tooth.

The teeth 27 from either side extend through the slots 23 and 24 into the magazine 10 and engage the logs that are fed into the said magazine during their passage by gravity to the log box 22. a

The progression gears 25 and 26 are 'mounted on the shafts 31 and 32 respectively, these shafts being journalled in bearings 33 and 34. There are preferably a group of the gears 25 and a group of the gears 26, one group on one side and one group on the other side of the magazine 10, and these groups may in so far as the progression gears are concernedbe'in theform of teeth projecting from the periphery of the cylinders 35, which are supported from the hubs'36 and form closures for the slots 23 and 24 said'hubs' being keyed to the shafts 31 and 32. V

The driven gear wheels 37 are mounted on the shafts 31 and 32 and coact with the driven gear wheels '38 mounted on the shafts 39 and 40, j ournalled in the bearings 41, said shafts 39 and 40 being operated by worm wheels 42 coacting with the worms 43 on the The worm shaft 44 is suitably connected to the power installation by the chain and sprocket mechanism 45 thus the progression gears 25 and 26 are slowly rotated, which means that the logs fed into the magazine will come in contact with the backs 30 of the teeth 27 and are engaged by the faces 28 and press downwardly, that is to say, the logs are pressed by successive faces and the intervening logs carried therewith, therefore the logs below in the log box are pressed by those above and held during the operation of grinding permanently on to the grindstones 46 and 47, until they finally pass through in their ground condition, this operation is continuous so long as there is an added feed of the logs.

The grindstones 46 and 47 are mounted on the shafts 4:8 and 49 respectively, journalled in suitable bearings and driven through a gear mechanism by a motor 50 at the desired rate of rotation. Said grindstones 46 and 47 are spaced apart at a predetermined distance to permit the passage of the ground wood for pulping purposes.

The log box guides 51' and 52 are slidably arranged on either end of the stones 46 and i7 and extend downwardly in the log box in order to direct the logs on to the stones, these are supported by the adjusting screws 53 operating in the brackets 5d and adjusted by the nuts 55, and are perforated and joined at their lower ends by the grinder cross beams 56 of inverted V-shape in its several sections 57 engaging the stones-46 and 47. a

It will be thus seen that the logs press downwardly into the log box 22 and are maintained at considerable pressure on the tops ofthe two stones 46 and 47, and as these stones are continuously rotating towards one another the logs are ground into a comparatively fine state, and this material passes between the sections 57 of the cross beams 56 down through the stones.

The jets 58 and 59 of water are continuously playing on the stones to maintain them in a sufliciently cool condition and at the same time augment the flow of the ground wood.

These jets come from a nozzle 60 connected to a suitable water supply and having a plurality of jet orifices angularly directed towards the stones.

The spray pipes 61 and 62 are situated at the upper end of the magazine 10 on either side and spray the wood as it enters.

At the lower end the stones d6 and 47 turn in a concrete basin 63 from which the overflow drain 64 leads, this drain being protected by the screen 65 to save the ground wood which is otherwise discharged by openin O the valve 66 when thestock is at the desired consistency.

The framing 67 surrounds the grinding mechanism and the doors 68 are provided for inspection and for trueing purposes said framing being formed in end sections 68 and 69 from a middle section 70, either end section being removable and replaceable for changing the stones.

The elevated board walk 69 extends from said frame 67, and is a convenience to the engineer and attendant during the operation of the machine.

It has already'been explained that in operation the logs are fed into the magazine is under constant pressure against the pev riphery of the grinding stones, and as these stones revolve in directions towards one another, the ground pulp is sent through the wide openings in. the cross beams, and carried downwardly between the stones to: the well or basin therebeneath, free water flowing from this stock, until its density is suitable for manufacturing purposeswhen it is withdrawn as explained by opening the valve 66.

\Vhat Iclaim is z- 1. In wood grinding machines,a magazine in stack form having a fiaringlower end parted by a crotch and dividing the feed, grindstones operating at the discharge ends and progression gear wheels suitably driven and projecting through the stack wall at either side at the beginning of the flare.

2. In wood grinding machines, a magazinc in stack form having a flaring lower end parted by a central cross beam forming a crotchand dividing the feed, grindstones operating at the discharge endsand progr'ession gear wheels suitably driven and projecting through the stack wall at either side at the beginning of the'flare.

3. In wood grinding machines,a magazine in stack form having aflaring lower end parted by a crotch and dividing the feed, a pair of grindstones operating in a stock basin at the discharge ends, a spray member secured to said crotch forcooling said grindstones and promoting the flow of the ground wood, a log boxmounted above said stones, adjustableguides entering said log box and extending below the peripheries of said stones, means for driving said stones, progression gear wheels projecting through the stack wall at either side at the beginning of the flare, a wormdriving mechanism operated from the aforesaid .driving means, and a gear mechanism driven by said worm mechanism and operating said progression gears.

i. In wood grinding machines, a magazine in stack form having a flaring lower end parted by a crotch and dividing the feed, grindstones operating at the discharge ends, a framing enclosing the grind stones and formed in sections and having an end section bodily removable for changing a grinder, and progression gear wheels suitably driven and projecting through the stack wall at either side atthe beginning of the flare.

5. In wood grinding machines, a magachange of stone, and progression gear wheels zinc in stack form having a flaring lower suitably driven andprojecting through the end parted by a crotch and dividing the stack Wall at either side at the beginning of 10 feed, grindstones operating at the discharge the flare.

5 ends, a framing having removable sections Signed at Montreal, Canada, this 17th enclosing each grindstone and adapted to be day of September, 1927. removed and replaced respectively at each HARRY FRANCIS TYNER. 

